First, bicycle lock (old fashion)
Our country is a bicycle kingdom. China's bicycles are the most in the world, with at least several hundred million. If every bicycle is locked, the number of bicycle locks can be quite a lot.
Now introduce the old-fashioned bicycle lock. The bicycle lock is used to lock the bicycle tripod and the wheel so that the wheel does not rotate, thereby preventing theft. This type of bicycle lock is different from door locks and other padlocks.
When the bicycle lock is installed with this type of lock, the lock is fixed to the tripod with a wire and a splint. The lock is made of iron sheet, and the structure mainly includes a lock body, a lock core, a spring, a marble and a lock column, a tension spring, a pin, and a bolt. Its lock body is inside the iron cladding. The lock is a five-ball hole, 10 marbles, belonging to a small five-tooth lock, and a card at the end of the lock. This dial card can be used to move the bayonet to move the bayonet up and down. When the latch pin is caught in a recess of the long lock post, the hospital lock cylinder can be controlled to lock the wheel and prevent the wheel from rotating. A force spring is mounted at the end of the lock cylinder. There is also a push pin at the center of the outer side of the lock cylinder. This push pin is exposed to the outside of the lock body (the entire lock case is made of iron). When the lock is in the locked state, the latch pin catches the groove on the lock, so that the lock post cannot move. If the key is extended, the lock is twisted clockwise by 90 degrees, then the card is pulled and the card is pinned. Pull up, so that nothing catches the groove on the lock cylinder. The lock cylinder is pulled back into the lock body under the action of the tension spring, and the lock is opened. At this time, the keyhole of the lock key is 90 degrees from the original lock state. This is because a spring installed in the lock body is stuck against the lock core, so that the lock cannot be automatically rebounded to the original position, so that the concave tooth groove on the key is caught by the marble, and the keyhole of the lock key cannot be directly dialed. The key can be dialed out unless the lock is relocked and the lock and key are returned to their original positions.
The weakness of this kind of lock is: 1 can not prevent cockroaches and cockroaches; 2 can not prevent technical opening; 3 can not prevent oxygen welding, cutting guns can be broken; 4 can not prevent chemical corrosion; 5 can not prevent drilling; 6 can not prevent the imitation of the key.
Second, the bicycle chain lock This kind of chain lock is used by people to lock on the front or rear wheel of the bicycle, or to lock the bag, the password box, and also used to carry the bag on the train to the luggage rack.
The lock is a small four-toothed lock. The lock body is made of aluminum alloy and has a cylindrical shape with a diameter of about 25 mm and a length of about 5 cm. The lock is made of all copper and is mounted in the central part of the lock. The lock is connected to a steel chain of about 6 mm thick at the flat end of the lock body. The entire chain is covered by a plastic hose, and the chain is about one foot eight inches long. A steel lock stud is attached to the other end of the chain. There is a circular groove around the ring on the stud head. There is a round hole in the plane at the other end of the lock body, that is, the lock cylinder hole, just enough to fit the lock column head. Inside this round hole is a lock pin that is connected to the lock. There is a piece of shrapnel on the lock pin. If the lock head is inserted into the hole of the lock cylinder, the spring will pop the lock pin and not lock the circular groove on the lock head, which is locked. If the lock is unlocked, just extend the key into the keyhole of the lock key and twist it 90 degrees clockwise. The lock core pushes the elastic piece down. The elastic piece drives the lock pin to shrink back. Then the handle of the chain is pulled out by hand, and the lock is opened. It is.
The weakness of this kind of lock is: 1 can not prevent smashing, twisting and pulling off the chain, can not prevent smashing; 2 can not prevent technical opening; 3 can not prevent drilling; 4 can not prevent oxygen welding, cutting gun break; 5 can not prevent chemical corrosion ;6 can not prevent the imitation of the key.
Bicycle wire lock
Third, the bicycle wire lock This lock is a kind of lock that is modified on the basis of the bicycle chain lock. It replaces the chain lock chain with a general steel wire rope, and replaces the aluminum alloy lock body of the chain lock with a lock made of all steel. It is also a copper lock, a small four-tooth lock, four marble holes, eight marbles, four springs, and the base lock chain lock is much stronger.
The entire wire rope of this lock is about one meter or two. Normally, the wire rope can naturally curl into a ball. It can be stretched if needed, or it can be rolled into double strands to lock the bicycle. Because of its long wire rope, you can lock the bicycle on the railing post, or you can lock several bicycles together. Therefore, many people like to use this kind of wire lock to lock the bicycle.
The weaknesses are: 1 can not prevent technical opening; 2 can not prevent the steel bar clamp to cut the wire rope; 3 can not prevent corrosion; 4 can not prevent drilling; 5 can not prevent oxygen welding, cutting gun to break; 6 can not prevent the quilt imitation key.
Fourth, the new bicycle anti-smash lock This lock was only started in the early 90s. The creator of this lock is Liuzhou. He used to be a thief who specializes in stealing bicycles. He was sent to labor three times for stealing bicycles. After the last period of parenting, he decided to change his evil and be good, to be a human being, to contribute to society and to make a living for himself. He finally calmed down and studied the bicycle lock transformation technology. Later, he invented and created this. A bicycle anti-shackle lock, and patent application, set up a bicycle factory, named this lock "standard king bicycle anti-smash lock".
This lock has five marble holes, a few marbles, and is a small five-toothed lock. The key is made of all copper. Its lock body is an all-inclusive steel shell with no gaps. It does not have an open long curved slot on the lock cylinder of the lock body like the old bicycle lock, and there is no push bolt. It has a gear mounted behind the lock. This button is connected to a shrapnel that just catches a side slot on the lock. There is a strong tension spring at the end of the lock cylinder. When the button on the lower side of the hospitalized lock body is pressed by hand, the pinch spring of the lock pin will be disengaged from the unlocking heart. Under the action of the tension spring at the end of the lock cylinder, the gear on the lock post will drive the lock gear on the lock pin, so that The lock is turned and turned. The lock cylinder will contract back. When the lock is rotated 800 degrees (clockwise), the lock is fully opened, and the key opening is 80 degrees from the original position, and the lock is not returned to its original position. In this way, the marble card informs the concave slot on the key, and the key cannot be dialed out of the keyhole, and is in the state of the key. If it is locked, it is necessary to hold the key counterclockwise to twist 800 degrees, the rotation of the lock core drives the gear, and then drives the gear on the lock cylinder to extend the lock post downward, and naturally locks. At this time, the key can be taken out.
This lock locks the lock except for the keyhole, and there is basically no gap in other parts. Moreover, the lock case is made of all steel and is relatively strong. Therefore, the general thief uses a screwdriver, a small crowbar to lick this lock, and can not open the lock. The installation of this lock, like the old bicycle lock, is fixedly mounted on the bicycle tripod to catch the wheel and prevent the wheel from rotating.
The weakness of this kind of lock is: 1 can not prevent technical opening; 2 can not prevent drilling; 3 can not prevent chemical corrosion; 4 can not prevent oxygen welding, cutting gun break; 5 can not prevent the quilt imitation key.
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